DE1259819B - Device for the independent shifting and edging of rolling stock with a rectangular cross-section - Google Patents

Description

Device for moving and edging rolling stock independently rectangular cross-section The invention relates to a device. to the self-employed Moving and edging rolling stock with a square or rectangular cross-section in rolling mills with two sliding members in the manner of rulers, both of which are equipped with a position sequence control, but only one has a folding device having an input device for the setpoint values of the start and end positions the sliding members is provided and the input device the two sliding members assigned position memory are connected downstream.

In known devices of this type, the input device except for the setpoints for the start and end positions of the shift rulers the rolling stock from one point of the roller table while tilting the The material to be rolled is pushed by 90 ° to another point on the roller table, including the setpoints for the intermediate positions required for tilting the rolling stock.

The invention is based on the object of the intermediate positions automatically to determine and to let the movements run optimally. To solve this problem is according to the invention a subtracter for calculating intermediate positions intended for the folding process, which is derived from the signals of the two associated Positions of the sliding members before and after the edge forms a difference, this from that of a fixed or previously determined position of one of the Sliding elements subtracts the corresponding signal and this output signal to the setpoint input of the position sequencer of the other displacement member supplies.

The device according to the present invention can except for Use rolling mills wherever the task is defined between two Positions of a workpiece with this various' tilting or positioning operations perform. This can be the case, for example, when different surfaces of a workpiece are to be machined one after the other by a machine tool.

In the following, the invention is based on the example of the positioning of a Knüppels in rolling mills are illustrated.

F i g. 1 shows a reversing mill with right and left shift rulers; F i g. 2 shows the two calibrated rolls of the rolling stand; F i g. 3 shows a block diagram of the control device according to the invention; F i g. 4 A to 4 E show the different positions of the right and left sliding rulers and of the workpiece; F i g. 5 shows the basic structure of the register 67 in which the position of the tilt axis is stored; F i g. 6 contains the basic circuit diagram of the right gate 62; F i g. 7 contains the basic circuit diagram of the left gate 64; F i g. 8 explains the operation of gate 60; F i g. 9 contains the basic circuit diagram of one of the position sequencer 22 or 26.

In Fig. 1 shows the roll stand 10 with the rear roller table 12 and the front roller table 14. A metallic workpiece, e.g. B. a billet 16, comes straight from the roll stand 10 on the rear roller table 12. A right shift ruler 18 and a left shift ruler 20 move towards the workpiece and bring it into the position it must have when re-entering the roll stand. A right and a left position sequencer 22 and 26, in conjunction with the corresponding servomotors 24 and 28, cause the two displacement rulers to move. In the same way, a right sliding ruler 30 and a left sliding ruler 32 are provided for the front roller table 14, which are controlled by the position sequencers 22, 26 in an analogous manner. F i g. Figure 2 shows the upper roll 36 and the lower roll 38, as well as the billet 116 between the two, to cite only one type of roll stand for which the device according to the invention can be used.

F i g. 3 includes an input device 50 which is used in a known and. common type of punch card reader.

A stepping mechanism 58 is effective to deliver control signals according to a predetermined program to the individual parts of the control device. The input device 50 supplies the right position memory 54 with the start signal SR for the start position R of the right shift ruler, as shown in FIG. 4 A is shown. If the step switch 58 ' gives a control signal to the right position memory 54 , the start signal SR is supplied to the right position sequencer 22 via the right gate 62, at the same time as a further signal from the step switch 58, which then moves the right shift ruler 18 into its Starting position R, triggers. In the same way, the input device 50 supplies an initial signal to the left position memory 56; -and the step switch 58 gives a control command to the left position memory 56 and to the left gate 64, so that the signal SLo determining the starting position can pass the left gate 64, with a subsequent signal from the ScÜrittschaltwerk 58 then the movement of the left shift ruler in the position L , triggers.

When there is enough space on the roller table to tilt the stick in position L, the left sliding ruler 20 is moved to the left, and the tilting device, which here consists of a hooked edge 19, then tilts the stick 16 by the position Lo going axis. If, however, due to the size of the stick 16 or for other reasons, there is not enough space on the roller table for this operation, the input device 50 supplies a signal -to the memory device 52, so that any predetermined position signal SR1 is supplied to the right position sequencer 22, this causes the right sliding ruler 18 to run into this position R1. If this right shift is desired, the previously determined position R1 can always be the same. A suitable way of obtaining this position signal SR is to hardwire it or to provide it from the outset in the structure of the right-hand gate 62 by suitable means. When the right sliding ruler 18 runs into this predetermined position R 1, the left sliding ruler 20 moves to a position L1 in accordance with a signal which is obtained by forming the difference, which will be explained in more detail below. If the latter right shift is desired, the right gate 62 supplies the position signal SR, also to the .Subtrahing device 66. At the same time, the stepping mechanism 58 causes the two position memories 54 and 56 in .die .Subtrahieinrichtung 68 to output the output signals SR or SLo enter the corresponding displacement rulers.

The subtracter 68 supplies a second subtracter 66 with a signal; which corresponds to the difference (SR, - SLo). The subtracter 66 forms therefrom. an output signal SL "according to the relationship SLi = SR, - (SRo-SLo): This output signal SLI is fed through the left gate 64 to the waving control position controller 26 = and causes it to move into the position L1. The latter Output signal SLi is also stored in register 67 in response to a signal from stepping mechanism 58.

The input device 50, controlled by the stepping mechanism 58, then supplies the final positioning signal SRF for the right sliding ruler 18 to the right position memory "54 and the positioning signal SLF - for the left sliding ruler 20 to the left position memory 56 accordingly.

To determine the next position L2 for the left sliding ruler 20 according to FIG. 4 C and 4 D -delivers-de`r recfite position memory 54 of the subtracting device 68 the positioning signal SRF and correspondingly the left position memory 56 the positioning signal SLF. The subtracting device-.68 gives the difference (SR " - SLF) on -the subtracting device 66. The output signal SLi ,, which was previously stored in the -register 67, is fed via the right gate 62 of the subtracting device 66`. The position R2 des The right shift ruler 18 corresponds to the position L1 of the left shift ruler 20, so that the latter can be viewed as the position R2 for this phase of the positioning. according to the relationship L2 = Li = (RF - @ LF): ,, The control signal SL2. is now fed through the left gate 64 to the left position follower controller 26 and causes the left shift ruler 20- to assume the position "L 2, which the left side of the stick 16 -after its rotation around .die -will occupy the axis going through the position L1. If, as mentioned at the beginning, it was not necessary to move the entire arrangement of the position, L1 and R1, because there was enough space to tilt, then this phase is skipped and position R1. would correspond to position R. To determine position L2 occurs. then instead of position -Ll the position Lo. -If desired, the "left sliding ruler 20 can already be in position L ... before the right sliding ruler 18 leaves its position R1. However, it can be advantageous if the right sliding ruler 18. is still in the direction of the -Position P2 and at the same time the hook edge 19 moves upwards, so that the tilting of the stick-16 about the axis going through the position L1 begins. before the left sliding ruler 20 - its position. Has reached L2. This can be done by the left sliding ruler 20 triggering a signal when it is a distance from its position. L2 reached -has, .der- is approximately in the order of 10 cm. This signal is then intended to cause the right sliding ruler 18 to start when it moves from position R1 to position R2. The movement of each sliding ruler can be triggered by the relay 200 , as is shown in FIGS. where in the armature circuit of the corresponding adjustment motor there is a working contact of this relay, which is excited by the above-mentioned signal by means of the stepping mechanism.58, so that the start-up of the corresponding adjustment motor can be controlled in the desired manner. It should be mentioned here that the signal, which is to occur when the left sliding ruler 20 is at the said distance of 10 cm from position L, can be obtained from a device which is connected to the digital subtracting device 100 according to FIG. 9 acts.

The hook edger 19 can also be caused to move in such a way that they begin their upward movement in connection with the movement of the right sliding ruler 18 and thereby move on an arc of a circle, which is advantageous for proper tilting of the stick 16. When the stick 16 is tilted, it rests on the left sliding ruler 20, which is in position L1, and on the right sliding ruler 18, which is in position R2.

One can also achieve that when the stick 16 first falls onto the upper side of the left sliding ruler 20 and then slides down the side of the same. This prevents the stick 16 from hitting the roller table too strongly when it is tilted. Depending on the size and shape of the stick 16, one or more position-reporting devices can be provided which, in conjunction with the digital subtracting device 100, ensure that the start of the right sliding ruler 18 can begin at any desired point in time.

The stepping mechanism 58 now causes the right position memory 54 to deliver the final position RF in accordance with the positioning signal SRF through the right gate 62 to the right position follower 22, after which the right shift ruler 18 then assumes this position RF. In a corresponding manner, the left sliding ruler 20 then assumes its final position LF.

In the F i g. 4A to 4E show the successive positions of the two displacement rulers 18 and 20 and of the stick 16 . The hook edge 19 is arranged on the right sliding ruler 18. In Fig. 4A shows the billet 16 as it passes the roll stand 10 in its initial position. The right sliding ruler 18 is in the starting position R, and the left one in the position L. In order to obtain more space for tilting if necessary, the two sliding rulers can be moved to the right into the corresponding positions R1 and L1, as shown in FIG F i g. 4B are shown. According to FIG. 4 C, the left sliding ruler 20 is moved in the direction of position L, the hook edges 19 move upwards, and at the same time the right sliding ruler 18 starts from its position R1 to position R2, which corresponds to the previous position L1 of the left sliding ruler 20 , to move. The stick 16 is tilted around its edge located at position L1. In Fig. 4 D the left sliding ruler 20 is in its position L2 and the right sliding ruler 18 is in its position R2. The hook edgers 19 are back in their starting position, as shown in FIG. 4 A and 4 B are shown. In Fig. 4 E are the displacement rulers in positions LF and RF, which are required for the billet 16 to re-enter the roll stand 10.

F i g. 5 shows a basic circuit diagram for a digital location of the register 67. This consists of a NOR gate 70, which receives a control signal from the stepping mechanism 58 and an output signal SLi from the subtracter 66. As is known, the NOR gate 70 only supplies an output signal when none of its inputs is applied. Both the output signal SLi and the control signal from the stepping mechanism 58 consist of so-called zero signals. The output signal of the Nor gate 70 is passed on to a further Nor gate 72 which, together with another Nor gate 74, forms a bistable multivibrator. A signal then appears at the output of this bistable multivibrator which corresponds to the signal supplied by the subtracter 66 and which is fed to the relevant point of the right-hand gate 62.

In Fig. 6 shows the circuit for a digital digit of the right gate 62, which consists of a Nor gate 76 which receives a control signal from the stepping mechanism 58 and an output signal SLi from the register 67. A second Nor gate 78 receives a signal from the right position memory 54 and also a control signal from the stepping mechanism 58. If the stick 16 is to be moved to the right before the rotation, the gate 60 supplies the corresponding signal to the Nor gate 80. The signal from Right gate 62 is connected to right position sequencer 22 and subtracter 66 according to FIG. 3 delivered.

In Fig. 7 is a circuit diagram for a digital digit of the left gate 64, which includes a NOR gate 82 which receives a control signal from the stepper 58 and receives a signal from the subtracter 66. A second Nor gate 84 is provided, which is a control signal from the stepping mechanism 58 and a signal from the left position memory 56 receives. The output of the Nor gate 86 or des Left gate 64 is shown in FIG. 3 at the input of the left position sequencer 26 connected.

F i g. 8 shows a basic circuit diagram of the gate 60, which consists of a single Nor gate 88 exists, at whose input the control signal from the stepping mechanism 58 and the signal from the memory device 52 is present. The exit of the Nor gate 88 is at the corresponding digital locations of the legal gate 62.

F i g. 1 includes a sensing device 90 which emits a signal when a hot object is in its vicinity. This device reports the position of the stick. When the billet 16 has left the roll stand 10 so that its front side is in the vicinity of this device, a signal is thereby given to the step switch mechanism 58, which in turn causes the register 67 to be reset to its zero position. As soon as the stick assumes a position between the right and left sliding rulers, its rear end has reached or passed the scanning device 92, which acts in exactly the same way as the scanning device 90, so that a signal is again given to the stepping mechanism 58 . This now has the consequence that the left gate 64 blocks with respect to the signal SLo, the gate 60 is opened, the left gate 64 and the right gate 62 are opened with respect to the signal SR ,, and after a certain selectable time delay of the order of magnitude of 1 / looo sec the signal SLi is stored in register 67. The signal SLi is supplied by the subtracter 66.

In the right position follower 22 and the left position follower 26 is one reporting person each Device 106 or 106 'included, which responds when the difference between the specified and achieved position Is zero, which means that it is reported; that the displacement rulers 18 and 20 their predetermined Have reached setpoint positions.

Further details on this are shown in FIG. 9, which illustrates the right position follower controller 22 which contains a digital subtracter 100: The signal coming from the right gate 62, which in the example of FIG. 9 has only three digits, but can contain any number of digits, is applied to the input of the digital subtraction device 100 . The output or the position error signal of this digital subtracter 100 is passed on to a digital-to-analog converter 102 , which determines the movement of the servomotor 24 when the relay 200 is closed by the stepping mechanism 58. The position of the sliding ruler 18 actually reached in each case is input by the analog-digital converter 104 in digital form in parallel to the digital subtracting device 100. In this way, this device determines an error signal according to the difference between the digital setpoint value of the right-hand gate 62 input in parallel and the actual value corresponding to the actual position, which is supplied by the analog-digital converter 104. When the output signal of the digital subtracting device 100 is zero, all inputs of the position reporting device 106 have a zero signal applied to them, so that it supplies a control signal to the stepping mechanism 58, which signals that the right sliding ruler 18 is actually in the desired position completed. This signal of the NOR gate 106 has the effect that the gate 60 and, through the stepping mechanism 58, the right gate 62 are blocked, that the register 67 is also prevented from changing the information stored in it, and that the right gate 62 is finally opened again. The stick 16 is now in the position shown in FIG. 41). The output signals of the position reporting device 106 and 106 'cause the stepping mechanism 58 to move the right sliding ruler 18 and the left sliding ruler 20 in the direction of the positions according to FIG. 4 E triggers in that the final positioning signal SRF can pass through the computing gate 62 or the positioning signal SLF through the left gate 64. When the respective sliding rulers 18 and 20 are in the respective positions RF and LF, the position reporting devices 106 and 106 'provide signals to the stepping mechanism 58, from which it can be seen that the respective sliding rulers are in their desired positions, after which it is caused that the billet 16 is moved back into the roll stand 10.

The successive steps or changes are triggered by signals from the scanning devices 90 and 92 and the position reporting devices 106 and 106 ', the latter of which is indicated by an AND gate within the Stepping mechanism 58 act that a zero error signal arises when both Position reporting devices 106 and 106 'indicate that the respective setpoint positions are achieved. It should be mentioned; that the left sliding ruler 20, as it is -in F i G. 4 A to 4 E shown can be fully moved to position L2 before the right sliding ruler 18 leaves its position R2. Furthermore, the hook anchor 19 can also be actuated by a hydraulic shock device.

The working contacts of the relay 200 are closed by the setpoint signals SRo, SR., SR2 and SRF of the right position follower controller 22 and by the setpoint signals SLo, SL1 @ SL2 and SLF of the left position follower. The corresponding zero error signals then cause the armature circuit of the servomotors 24 and 28 to be interrupted by opening the corresponding relays.

The digital signals used in the positioning device can consist of several digital digits, these being coded in binary or decimal and can be entered in parallel as well as in series.

Claims (5)

Claims: 1. Device for independent moving and Edges of rolled material with a square or rectangular cross-section in rolling mills with two sliding members in the manner of rulers, both of which have a position sequence control are equipped, but only one has a Kaatvorrichtung, wherein an input device intended for the setpoints of the start and end positions of the sliding members is and the input device the two displacement members associated position memory are connected downstream, characterized in that a subtracting device (66, 68) is provided for calculating intermediate positions for the folding process, the from the signals of the two related positions of the displacement rulers (18, 20) before and after the edge forms a difference, this difference from that of a fixed predetermined one or a previously determined position of a signal corresponding to the sliding elements subtracts and this output signal to the setpoint input of the position sequencer (22 or 26) of the other sliding member supplies. 2. Device according to claim 1, characterized in that the setpoint input of the position sequencer (22, 26) as a function of scanning devices (90, 92) or of position reporting devices Devices (106, 106 ') releasing stepping mechanism (58) is provided. 3. Device according to claim 1 or 2, characterized in that the movement of the on one of the two displacement rulers (18) located hook edger (19) at the same time with this sliding ruler (18). is controlled. Considered publications: -German Patent No. 296 056; "Stahl und Eisen", Vol. 79 (1959), No. 3, from February 5, pp. 163 to 166; "Blast Furnace and Steel Plant", March 1958, p. 299 to 302, and January 1959, pp. 72 to 78; "Sheet Metal Industries", from June 1959, Pp. 431 to 433, 436.